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Old 12-24-2018, 10:42 AM   #1
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Default 2018 Roadtrek 210 Dually Conversion.

Finally after 3 months of way to many hours of research and labor, I have completed the true dually and suspension conversion (11.5" axle) on our 2018 210. So far the handling and ride are drastically improved. Lifted 3" in front, and 2" in back. Added bonuses: No needed spare tire, park assist works, more pulling power, much higher load capacity, undercarriage clearance.
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Old 12-24-2018, 03:00 PM   #2
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What was your cost to convert? I am think along the same lines for my 2017 Trend for better weight carrying capacity. Right now the Trend is not able to carry full tank of fresh water as it overloads the passenger rear tire (10 ply). The Trend is front wheel drive so no drive shaft connection needed.
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Old 12-24-2018, 03:20 PM   #3
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What method did you use to lift the front? I ask because once you get around that 3" mark, if you do it with just springs and stock A arms, you are getting close to hitting the frame with upper arm on downtravel, unless you limit the downtravel to a pretty small amount with the shock length.
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Old 12-24-2018, 09:16 PM   #4
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Quote:
Originally Posted by valvegod View Post
Finally after 3 months of way to many hours of research and labor, I have completed the true dually and suspension conversion (11.5" axle) on our 2018 210. So far the handling and ride are drastically improved. Lifted 3" in front, and 2" in back. Added bonuses: No needed spare tire, park assist works, more pulling power, much higher load capacity, undercarriage clearance.
Looks like a great upgrade. Too bad Roadtrek doesn't build them that way.
But I'm confused. Why do you think you no longer need a spare? How do you get more pulling power and higher load capacity? Did you replace the front suspension, spindles and rear axle?
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Old 12-25-2018, 02:14 AM   #5
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Looks like a great upgrade. Too bad Roadtrek doesn't build them that way.
But I'm confused. Why do you think you no longer need a spare? How do you get more pulling power and higher load capacity? Did you replace the front suspension, spindles and rear axle?
Presumably, the duals permit temporarily swapping a bad front tire with one of the rear wheels.

The load capacity is increased with four rear tires. I don't know how the duals themselves would increase pulling power which would seem more a function of the axle ratio employed.

For increasing load on a 210 , there is a less elegant but also less complicated way of accomplishing this which is to go to 7 inch rims and using a 265-75-16 tires which increases tire load capacity by almost 700 pounds. Axle capacity remains unchanged but I think the 60S Dana is quite capable of handling this load increase.
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Old 12-25-2018, 03:18 AM   #6
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The plate appears to be Michigan. Must be an auto engineer to pull off such a fabulous mod so quickly. A little writeup with more detail would be really great.

Most of us take more time than that to lift the front end 3 inches and still get it wrong.
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Old 12-25-2018, 08:33 PM   #7
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Looks good. The main thing is you're satisfied with your modifications.

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Old 12-26-2018, 01:29 AM   #8
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Originally Posted by cruising7388 View Post
Presumably, the duals permit temporarily swapping a bad front tire with one of the rear wheels.

The load capacity is increased with four rear tires. I don't know how the duals themselves would increase pulling power which would seem more a function of the axle ratio employed.

For increasing load on a 210 , there is a less elegant but also less complicated way of accomplishing this which is to go to 7 inch rims and using a 265-75-16 tires which increases tire load capacity by almost 700 pounds. Axle capacity remains unchanged but I think the 60S Dana is quite capable of handling this load increase.
Running with only a single tire on a dually will overload the tire. You could do it in an emergency but the tire would be ruined. It is not a good alternative to a spare. Also many folks have reported that roadside assistance would not make such a swap for them.

Load capacity does not increase by just adding tires. Depends on many factors like tire ratings as you noted. But axle rating is often the limiter. Load ratings are established by manufacturer and anything an owner does won't change it.

It would be good to hear the OP's answers since they made the changes and know the details of their van.
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Old 12-26-2018, 02:18 AM   #9
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Running with only a single tire on a dually will overload the tire. You could do it in an emergency but the tire would be ruined. It is not a good alternative to a spare. Also many folks have reported that roadside assistance would not make such a swap for them.
The van ran on one tire from the factory so it wouldn't overload the tire, assuming he was still within the original gross weight limit. I would certainly use it as a spare but would not bolt the flattened tire back on. Certainly get it fixed ASAP.
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Old 12-26-2018, 02:43 AM   #10
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Load capacity does not increase by just adding tires. Depends on many factors like tire ratings as you noted. But axle rating is often the limiter. Load ratings are established by manufacturer and anything an owner does won't change it.
There's no shortage of reports regarding rear tire failure from overloaded Chevys but what axle failures attributed to overload have been reported?

FWIW, the 60S axle rating is coincidentally 2X the 3042 lb E rated tire which prompts speculation that the 6084 lb axle rating assigned was more likely someone filling in the blanks rather than an engineering computation derived from a test bench.
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